Machine for smoothing and re-smoothing ingot molds and other hollow articles



Feb. 23, 1932. 7 R. HENRY 1,847,005

MACHINE FOR SMOOTHING AND RESMOOTHING INGOT MOLDS AND OTHER HOLLOW ARTICLES Filed July 21, 1928 4 Sheets-Sheet 1 R. HENRY 1,847,005 MACI iINE FOR SMOOTHING AND RESMOOTHING INGOT MOLDS AND OTHER HOLLOW ARTICLES Feb. 23, 1932.

Filed July 21,. 1928 4 Sheets-Sheet 2 R. HENRY 1,847,005

F eb. 23, 1932.

MACHINE FOR SMOOTHING AND RESMOOTHING INGOT MOLDS AND OTHER HOLLOW ARTICLES Filed July 21, 1928 4 Sheets-Sheet 4 Patented Feb. 23, 1932 OUGREE MABIHAYE, OF OUGEEE, NEAR LIEGE, BELGIUM, A CORPORATION OF BELGIUM MACHINE sou snoorr-rrne AND nn-snoorn'rne INGOT MOLDS AND OTHER HOLLOW narrates Application file-:1 July 21, 1928, Serial No. 294,473, and in Belgium July 29, 1927.

The present invention relates to a machine for smoothing and re-smoothing ingot molds and other hollow bOCllGS.

According to the present invention the in 'ternal surface of the article to be machined, -which surface is to have, in transverse section, any regular or irregular shape and also to have parallel surfaces or not as desired,

'to'its axis of rotation, is obtained by reason of the tool moving 1n alternate rectlllnear directions within a given variable or nonvariable angle in relation to the axis of rotation of the generant of the given surface, 7 and receives at the'end of the stroke, a progressively variable transversal displacement "in relation to this rectilinear movement according to a given scale, this displacement of the tool being combined with a corresponding intermittent rotary dlsplacement of the article to be machlned.

The combination of these two movements,

of the tool and of the article to be machined,

gives the desired section 011 smoothing or resnioothing.

The accompanying drawlngs show schema'tic'ally and by way of example a method of putting the-present invention into practice. Figure 1 is an elevation of the machine. Figure 2 is a plan. I

Figure 3 shows, on a larger scale, an end View looking in the direction of the arrow X (Figure 1).

Figure a shows, on a larger scale, a section along 14 Figure 2.

Figure 5, a detail fragmentary longitudinal view on the line of Flgure 2, to

. illustrate suitable known interrelated dogging and reversing systems or mechanisms,

the frame 1, support 2, carriage 8, cage and associated parts being omitted and motor 19 being illustrated in elevation.

, Figure 6, an end'elevation of the clutch niemher and a fragment of the carriage or on which is mounted-the stop lug view in elevation of the dogging and gearreversmg clutch operating bar or rod with its throw levers and weight in solid lines. in one'extreme position and in dotted lines in intermediate position.

- Figure 9, a View similar to Fig. 8 with the parts illustrated in solid lines in the reverse extreme position, the throw levers and weights being shown in dotted lines in a reverse intermediate position, and

Figure 10, a view similar to Figure 1 with the carriages 9 and 11 moved to their extreme in such a way that it can be displaced trans- V versely, for example, on a ball-bearing guide 6. A carriage 8 is mounted to slide on the guides?) and but can be clamped thereon,

whilst a carriage 9 maybe clamped in posi- 131011 on the guides 3 and l, on which it is slidably mounted and a carriage 11 1s mounted on this carriage 9, but in such a way that it can be moved late-rally, for example, by meansof the ball-bea'ring guide 10. The carriages 8 and9 can be moved independently of one another on their respective guides inany known and suitable manner, for example by a common operating screw 12, which may be driven by an electric motor 13 through the intermediary of the gears 14.

The carriages 7 and 11, movable in a lateral direction, as indicated above,' are conncctedto one another, either in a jointed,

semi-jointed or rigid manner, by a carriagecarrier 15 on which the tool-holder 16, driven by the screw 17, is guided longitudinally.

The screw 17 is alternately rotated'in reverse directions by any suitable means. One suitable means is illustrated and comprises a motor 1.) driving a' gear 18, a gear 18 constantly in mesh with, and driven by the gear 18 and mounted on a shaftlSa to turn therewith. Two smalldrive pinions'103 and 104 are mounted on shaft 18a to turn therewith. Two driven pinions 103 and 104 are RAYMOND HENRY, or RODAIJGE, Luxnmiauno, essreivon T0 socrnrn ANONYME are in constant mesh with each other.

mounted on the shaft 102 so as to be capable of rotating freely thereon. A reverse pinion 103a is mounted on stub-shaft 103?) and is constantly in mesh with pinions 103 and 103 and said pinions 103 and 103 are not in mesh with each other. The pinions 104 and 104 p c From the above it follows that pinions 103 and 104 will constantly rotate in reverse directions.

:lug 101a engaging in a slot. in the shifting or reversing lever 132 pivotally mounted on a lug of the carriage or housing 7 by means of apivot pin 106 and provided on its upper end with a weight 133 to, by its momentum,

throw the lever 132 in reverse directions over dead center.

A drive pinion 17 a is mounted on the shaft 102 to turn therewith and is in constant mesh with a driven pinion 17 mounted on the screw 17 to turn therewith. v

A reversing rod 107 havinga loop or eye .135 toreceive and engage the lug or pin 134 carried by the lower end of the lever 132 to throwthe latter alternately from one side to the other to alternately couple the pinions 103 and 104 with the shaft 102 to cause rotation alternately in opposite directions of the screw 17 may be guided for reverse reciprocatory motion in a guide bracket 140 on the free end of the cutter bar and also in a bracket 138 provided on the carriage 11 and is provided with front and rear stops 108 and 109. fixedly mounted on said reverse or control rod 107 and alternately engaged by the cutter carriage 16 as the same approaches the'extreme limit of its forward and rearward motion. The loop or eye 135-permits some endwise movement of the rod 107 until the front or rear inner face of said eye 135 engages the pin 134, whena very slight further movement of the rod 107 serves to throw the lever 132 over into its reverse position with a quick snappy action, thus coupling the previously free pinion 103 or 104 to rotate with the shaft 102 and so reversing the direction of rotation of the shaft 102.and of thescrew 17 and the direction of travel of the cutter carriage 16.

To guard against the chance of this rod .107 being moved to an intermediate neutral .or; inoperative position two throw levers are provided and each said lever is provided with .a weight to move it one way or the'other and said leversare so related that when one is in dead center position the. other will have moved beyonddead center position, so that the weight of one or the other or both together will always be operative to positively cause the endwise movement of the rod 107.

One of said throw levers may be thelever 132.

The other one of said throw levers may be a lever such as 139 pivotally mounted on the bracket 138 of carriage -11 by a pivot pin 137, and having a bifurcated lower end portion to receive and engage a lateral pin or stud 136 carried by said rod 107. A weight 141 is mounted on theupper end of lever 139.

The above described driving and reversing gear mechanism is per se old in the art and well known and in extensive use and no claim per se thereto is made by me, but it is merely illustrated anddescribed in detail to promote a better understandingof my invention in whichit is employed.

Since the cutter bar 15 is illustrated as rigid with the carriage or housing 7, and alsois described and shown in Fig. 2 as having a positive connection with the carriage 11 by means of the bifurcated end 20 of said cutter bar receiving the pin 21 of said car riage 11, and since it is essential that, as de- A scribed, the carriage 11 shall be capable of moving laterally under the control of its pattern wheel 34'to a greater extent than the carriage 7 under-the, control of its patternwheel 33, and vice versa, it necessarily follows that carriage 7 must be capable of at least a partial rotary, motion to permit the accommodation of the parts to the varying angles or relations, and to this end the carriage or housing 7 has a flange or collar 142' supported for relative rotary or partial ro tary movement on the base 7' and held thereto by means of overhanging clamping lugs 141 held to the base 7 by bolts 142.

The end of the carriage-carrier 15 is connected to the carriage 11 in a readily detachable manner, for example. by a bifurcated prolongation 20 of the said carrier 15, en-

gaging on the vertical journal 21 and covered by the plate 22, which forms a part of the carriage 11.

The carriage 8 carries a cage 23 so that the latter may rotate about an axis located longitudinally of the frame 1, said cage having a toothed rim 24. a

The hollow article 26 is fixed inside the cage 23 by screws v25, which also serve as the means for centering the said article, which, in the example shown, is an ingot mold, before being smoothed or re-smoothed internally, the carriage-carrier .15 passing through the cage by the openingin the ingot mold.

The frame- 1 is completed by lateral supports 27, 28, 29, provided with bearings 30 in which a spindle 31 is supported parallel to the axis of rotation of the cage 23, so thatfit may be rotated. On the spindle 31 is fixed, opposite to the toothed pulley 24 of the cage 23, a toothed wheel 32 having, in the example given, adiameter equal to that of the toothed pulley. 24, and opposite the transversely movable carriages-7 and 11 are fixed the cams 33-34 having either equal, similar, or difierent profiles according to the sectional shape to be given to the inside of the article to be machined. In the example shown these cams will have similar profiles as that shown in Figure 3, the cam 34 being slightly smaller than the cam 33 in view of the divergence or convergence of internal surfaces of the ingot mold. I

The carriages 7 and 11 arexconstantly ur ed towards the cams 33, V 34, by any suita le method for example by freely suspended weights 35, connected to the corresponding ends of the carriages, by the cables or chains 36 which pass over the grooved pulleys 37 mounted on the spindle 31 so as to be capable of rotating freely thereon, the said carriages bearing against the respective cams by means of rollers 38. V

The toothed rim 24 of the cage 23 and the toothed wheel 32 on the cammed spindle 31,

. 33, 34, engage with a common pinion 39 fixed on a shaft 40 mounted at one end in bearings 41 and at the other end in a speed reducing box 42, said box being fixed on a support 43 on the frame of the machine. Inside the box 42 a worm-wheel, for example, is located which is keyed on to a spindle 40 and en- 1 gageswith a screw 44. To the latter is keyed a ratchet-wheel 45 co-operating with anordinary pawl system 46, 47, 48, operated by the tool-holder carriage 16 when the latter reaches the end of its strokes, through the intermediary of any usual clog-transmission system.

The movement of the tool-holder carriage 16, as stated, will be reversed in any known and convenient automatic manner, for instance, by mechanism such as above described, and the dogging means, or dog-transmission system and the means for reversing the movement of the carriage 16 will preferably be directly interrelated so that a single control means will govern the action of both mechanisms.

Said dogging means, or dog-transmission system may be such as herein illustrated,

wherein the control rod 107 serves as the governing means of the dogging means also, because of the fact that said control rod 107 governs the direction of rotation of the screw 17 and the drive pinion 110 mounted on said screw 17 actuates the dogging means.

Said dogging means comprises said pinion 110, a driven pinion 111 in constant mesh with pinion 110 andmounted on a shaft'lll to rotate therewith or about the axis thereof, a pinion 112 mounted on said shaft 11 and turning with pinion 111 and in mesh with a pinion or gear 113 carrying the male member 115 of a yielding cone clutch and mounted to turn about a stub-shaft 114 mounted in the carriage or housing 7.

V The female member 116 of said yielding .cone clutch is mounted on said shaft 114 and yielding pressed against the member 115 by a spring 117 disposed about said shaft 114 rigid with the frame 1 of the machine, is carried up and connected to the hooked end of the pawl lever 46 mounted to swing about the spindle 40 to which is keyed the ratchet-wheel 45 and carrying a yieldingly pivotally mounted detent 46 to engage and partially rotate in one direction the ratchet wheel 45, which in turn causes a partial rotation of the shaft 40 with its'pinion 39 and consequently of the gears 24 and'32with which said pinion 39 is constantly in mesh as above stated. 7

Av stop finger 123 is carried by the female member 116 of the yielding clutch and engages alternately opposite sides of the stop lug 125 integral with, or rigidly mounted on the carriage or housing 7, to prevent the con-. .tmual rotation of the member 116, but to allow one nearly complete revolution thereof each time the direction of travel of the cutter-carriage 16 is changed so as to allow a slackening of the chain 48 as the block 121 approaches its lowest point to allow the detent 46 to be pulled down by its weight 47 to its initial position as indicated in dotted lines on Figure 3 and to permit it to be pulled back up to the end of its operative thrust or stroke, as indicated. in full lines in Figure 3, to cause single partial rotation of the shaft 40 and hence of the work piece and of the cams-33 and 34. Since the male member 115 is constantly turning and since the female member 116 is held against turning, the spring 117 will be slightly compressed to allow slight axial movement of the member 116 away from member115 to permit slip between the opposed faces of said members 116 and 115.

The relation of the gears, and the timing of the operations are; such that after the control rod 107 has been moved sufficiently to reverse the direction of travel of the cutter carriage 16 thenearly complete rotary movement of .the member v 116, andhence the parti-al rotation of thework piece and the pattern cams 33 and34 will have been completed and said work piece and cams will be at rest in' "cable being connected at one'end to the carriage-carrier 15, while from its other end is suspended a balance weight 51 the purpose of which .is explained later.

Preferably the tool-holder carriage 16 will vbe provided with two oppositely presented cutting tools 16' and 16". Each'of said tools will be preferably mounted upon a block 126 or 127 respectively, said blocks being pivotally mounted on the carriage 16 by pivot pins 128 and 129 respectively so as to be capable of swinging away from each other under the drag of the inoperative tool on the work piece and are pulled toward each other by the spring 131 so as to alternately engage the backing block or abutment 130. Thus, as the tool-holder carriage 16 moves in the direction of arrow V of Fig. 5 so that the tool 16" engages and cuts the work-piece, the block 127 will be forced against, and supported by, the abutment 130, whereas the spring 131 will yield to allow the block 126 to move away from said abutment 130 to move the edge of tool 16 slightly in anarc sothat it may yieldingly slide in contact with the workpiece, a usual and well known detail construction in general use in the art. The machine shown operates as follows.

Supposing that the ingot mold is in position as shown in the drawings, and that the cams 33, 3% have been placed on the shaft 31 so as to cause the resulting internal shape of the ingot mold to diverge slightly in the direction of the arrow the carriage-carrier will then be inclined, in the horizontal plane, to the axis of rotation of the cage 23 at an angle exactly equal to the above mentioned divergenceof the interior of the ingot mold. As soon as the motor 19 is started, the screw 17, driven by the reducing gears, will cause the tool-holder carriage 16 to advance, for example, in the direction of the arrow il so that one of thetools will remove, when it enters into the ingot mold, a

shaving from the given place ofthe internal surface of the latter, and along the whole length of the ingot mold. As soon as the workihg tool has emerged a suitable desired distance from the opposite end of the ingot H mold, the tool-holder carriage 16 strikes against dog 109 of the transmission system of dogs mentioned above and causes, by

means of this system, an angular displace ment of the pawl lever 46 in the direction of the arrow .2, and hence the sprocket-wheel 15 and the screw let are rotated a corresponding amount, this rotation being transmitted by the worm-wheel in the casing 42 to the shaft and pinion 39, the latter transmitting the movement to the toothed wheel 32, keyed to the shaft 31 and cams 33 and 3st, and also to the toothed rim 24 fixed to the cage 23 containing the ingot mold 26. It follows that this rotary displacement of the ingot mold 26 is combined with a corresponding transversal displacement of the carriages 7 and 11 and hence the carriage carrier 15 and the tool-holder carriage '16, this transversal displacement being caused by the cams33 and 34 respectively and theweights 35, supposing that the various parts, at the moment of the above-mentioned passage of the tool, are in the positions shown in Figure 4, and the ingot mold will move, at the'same time as the said combined displacement, for example, in the directionof the arrow B, and the tools'with their supporting system, a corresponding amount in the direction of the arrow S.

' At the same time'that the'partial rotation of the work is completed the direction of gtravel'of'. the oa-rriage'lo is reversed by the shifting of clutch 101, as above described. The screw 17 then rotates in the reverse direction drawing the tool holder carriage in the direction of the arrow T,and it is now the second tool which cuts away a shaving from the side of the track made by the first tool. As soon as thetool-holder carriage has emerged a suitable distance from the opposite side of the ingot mold, it causes, by

the action of the said dog-transmission system, combined rotary displacement of they ingot mold and a transverse displacement of the tools equal to that which-has been described above and the reversing of the screw 17 as before, and the same operations are repeated until the entire periphery of the internal surface of the'ingot mold or other hollow body, has been smoothed or resmoothed. It is evident that during this operation the article to be machined will be displaced, after each passage of the tools, in an an ular direction which will always be the same, whilst the tools and the supporting apparatus will undergo at the same time,=in a case where the internal sectlon of the article under treatment is not circular, a

transversal displaceni'enjt'in one directionor the other, according to whether the generant of the internal surface of the article moves away from or approaches'the axis of rotation. Q

If, duringthe operation, one or other of the toolsbecomes defective it is only necessary to stop the machine at the moment when the tool-holder carriage 16 is outside theingot mold, at either end of the latter, and to replace the defectivetoohwhich replacement can be effected in an easy, rapid and exact manner in the same way as in a simple planing machine. v

As soon as the ingot mold or the like 1s smoothed orre-smoothed throughout its entire internal periphery the motor 19 is stopped, preferably at the moment when the toolholder carriage 16 is located at its position nearest the carriage 7. Then the cables or chains 36 are unhooked from the carriage 11, this can readily be effected for example by simple stretchers.

When this has been done the carriages 8 and 9 areunfastened from their respective guides, 3, 4 and 3, 5 or 3, 4, 5, then the said carriages are coupled to the screw 12 and the motor 13 is started up inthe direction such that the screw 12 draws the carriages 8 and 9 in the direction of the arrow U. r

The bifurcated end 20 of the carriage-carrier then disengages from the carriage 11, the journal 21 and the cover 22.

Hence the carriage carrier 15 is located in an unsupported position on the carriage 7 and it is then that the counter-balance 51 and the cable or chain 50 come into operation by balsition such that the left-hand edge (Figure 2) of the ingot mold has passedin the direction of the arrow. U or W -the end of the carriage-carrier 15, the motor 13 is stopped.

- It is to be observed that the carriage or slide 8 has a horn, projection or shoulder portion 100, which serves. as a complementary support for the tool carrier supporting and guiding bridge 15, and which, during the planing operation of the machine, occupiesthe position shown in Fig. 1, whereas in the position of the carriage 8 immediately above described, said complementary supportlOO supports the free end. of the bridge 15.

The screws are then loosened on the cage 23 thus freeing the ingot mold 26, the latter being withdrawn from the said cage 23, for

example, by the aid of a travelling crane,

while moving the carriage 8 with the cage 23 by the mechanism 12, 13, 14 independently of the carriage 9 (which remains at rest during this period) in the direction of the arrow Y.

The finished ingot mold being thus removed from the machine it is replaced by another in the obvious way when the above described operations are repeated.

In certain cases it may be advantageous, above all from the point of View of economy of time, to remove the finished ingot mold from the machine with the cage 23, 24, and'to replace it by the next ingot mold previously fixed in a reserve cage.

- It is obvious that the object of the present invention lends itself to a large number of variations when being carried out, without de-' parting from the real spirit of the invention. For instance, the arrangement of the car riage-carrier 15 and the method of operating the cams 33, 34, could be arranged in any we'll- ;nown manner to permit of treating hollow bodies having one end closed. 7 On the other" hand, the ingot mold or the like to be machined instead of being supported directly within the cage 23, or the centering screws connected thereto, may be supported within the cage 23 by a supportingand centering apparatus which is rotatable concentrically in and in relation to-the cage '23 which would considerably facilitate the fixing of the ingot mold or the like in an exact angular position in relation to the gears 24,32, 39, that is to say, in relation to the cams suchas for exam ple, 33, 34.v Moreover, it is obvious that the cams such as, for example, 33, 34, may be re-- placed by slotted discs, combinations of levers or any other kinematic movements which are capable "of producing the shape of "the facesto be smoothed or resmoothed.

Claims:

' 1. A planing machine for operating uponthe internal faces of hollow bodies, saidma-" chine comprising a rotatably mounted work holder adapted to hold a hollow body, a supporting bar adaptedto extend longitudinally through said work holder, and a tool holder mounted on said bar for reciprocation longitudinally thereof, in combination with automatic means for reciprocating said tool holder, automatic means for transverselydis placing, and altering the angular relation'of' the axis of said work holder and, said bar in conformity to the internal face of the particular hollow body, and automaticmeans for partially rotating said work holder a predetermined degree at predetermined points of the reciprocatory movement of said'tool holder.

2. A planing machine for operating upon the internal faces of hollow bodies, said chine comprising a base, a transversely and angularly movable slide at one end of the bed, a supporting bar connected to said slide and extending toward theother'end of the base, a tool holder mounted on said bar, means on said slide and bar'for reversely reciprocating said tool holder longitudinally of said bar, a longitudinally movable slide mounted on said base near the other end thereof, a transversely movable slide mounted upon said longitudinally movable slide, means upon said second transversely movable slide for supporting and detachably con necting to it the free end of said bar, a longitudinally movable work holder slide mounted on said base intermediate said transversely movable slides, and a rotatable work holder mounted in the work holder slide, in com bination with automaticmeans for independently transversely displacing the respective transversely movable slides and for simultaneously rotating said work holder with a step by step movement at predetermined points in the reciprocatory movement of said tool 5 holder.

' 3. A planing machine for operating-upon the internal faces of hollow bodies, saidmachine comprising abase, a transversely and angularly movable slide at one end of the base, a supporting bar connected to said slide and extending toward the other end of thebase, a tool holder mount-edon said bar, means on said slide and, bar for reversely reciprocating said tool holder longitudinally of said bar, a' longitudinally movable slide a workpiece therein, in combination with automatic means for independently transversely displacing the respective transversely movable slides and for simultaneously rotating said work holder with a step by step movement at predetermined, points in the reciprocatory movement of said tool holder.

4. A planing machine for operating upon the internal faces of hollow bodies, said machine comprising a base, a transversely and angularly movable slide atone end of the base, a supporting bar connected to said slide and extending toward .the other end of the base, a tool holder mounted on said bar, means on said slide and bar for reversely reciprocating said tool holder longitudinally of said bar, a longitudinally movable slide mounted on said base near theother end thereof, a transversely movable slide mounted uponsaid longitudinally movable slide, means upon said second transversely movable slide for supporting and detachably conneotingto it the free end of said bar, a longitudinally movable work holder slide mounted on said base intermediate said transversely movable slides, a work holder mounted in' the latter longitudinally movable slide, and a circular external gear secured to said work holder to turn therewith, in combination with a shaft, a gearmounted on said shaft to turn therewith, suitable means actuated by said shaft and interposed between said shaft and said transversely movable slides for transversely displacing thelatter, and means in terposed between said gears for causing their simultaneous periodic partial rotation.

5. A planing machine for operating upon the internal faces of hollow bodies, said machine comprising a base, a transversely and an ul-arly movable slide at one end of the base, a supporting bar connected to said slide and extending towardthe other end of the base, a tool holder mountedvon said bar,v means on said'slide and bar for reversely reciprocating said tool holder longitudinally longitudinally movable work holder slide.

mounted on said base intermediate said transversely movable slides, a work holder mounted in the latter longitudinally movable slide,"

and a continuous gear provided on said work holder to turn therewith, in combination with a shaft, a gear mounted on said shaft to turn therewith. control patterns mounted on said shaft and respectively engaging the respective, transversely movable slides for transversely displacing the latter, and means in-l ,terposed between said gears for causing their simultaneous periodic partial rotation.

transversely movable slide- 6. A planingmachine for operating upon the internal faces of hollow bodies, said ma-.

chine comprising a base, a transversely and angularlymovable slide at one end of the base, asupporting bar connected to said slide and extending toward the other end of the base, a tool holder mounted on'said bar, means on said slide and bar for reversely reciprocatingsaid tool holder longitudinally'of said bar, a longitudinallymovable slide mounted on said base near the other end thereof, a transversely movable slide mounted upon said longitudinally movable slide, means upon said secondtransversely movable slide for supporting and detachably connecting to it the free endof said bar, a longitudinally movable work holder slide mounted on said base intermediate said transversely movable slides, a rotatable workholder mounted in the work holder-slide, and supporting means carried by the work holder slide for engaging and supporting the free end portion of said supporting bar when said work holder is mounted to its extreme outer position, in combination with automatic means for independ ently transversely displacing the respective transversely movable slides and for simultaneously rotating said work holder with a step by step movement at predetermined points in the reciprocatory movement of said tool holder.

7 A planing machine for operating upon the internal faces of hollow bodies, said machine comprising a base, a transversely and angularlv movable slide at one end of the base. a supporting bar connected to said slide and extending toward the other end of the base, a tool holder mounted on said bar, means on said slide and bar for reversely reciproeating said tool holder longitudinally of said bar, a longitudinally movable slide mounted on said base near the other end thereof, a transversely movable slide mounted upon said longitudinally movable slide, means upon said second transversely movable slide for supporting and detaohably connecting to it the free end of said bar, a longitudinally movable work holder slide mounted on said base intermediate said transversely movable slides and a rotatable Work holder mounted in the work holder slide, in combination With automatic means for independently transversely displacing the respective transversely movable slides and "for rotating said Work holder with a step by step movement at predetermined points in the reoiproeatory movement of said tool holder, and means for independently longitudinally displacing said longitudinally movable slides.

In testimony whereof, I have signed my name to this specification at Brussels, Belgium, this 10th day of July, 1928.

RAYMOND HENRY. 

